Sink



FIG. 1 is a front perspective view of a sink showing my new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is left side elevation view thereof, the opposite side being amirror image thereof.

FIG. 4 is a top plan view of my new design.

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is bottom plan view a thereof.

The ornamental design for a sink, as shown and described.